wat would happen if a nuclear reactor exsploded

It all depends on how close you are? If your close enough it doesn't matter, if your a bit farther away you could deal with fallout, and if your far enough away to be clear of radiation, you should be care full of where the water your drinking comes from! If you are cleared or radiation, but get your water from a river or stream that comes from or connects to the damaged reactor that is upstream, then you need to test your water! You could be drinking all kinds of known Carcinogens!